First I want to thank those that pointed out that my first two postings didn't contain message content, probably due to using HTML. You were right, I changed the default for this email program to plain text.
Second thank you to the responders that suggested solutions to my "instability" non-problem. Turns out it was the input level to the HP 5334A. Adjustment of the counter nailed it pretty close. Stabilized at 49.380000 MHz +-2 Hz. 73 Gary Marklund KJ7RT Sun City, AZ USA > -------- Original Message -------- > Subject: [Elecraft] XG50 - Frequency Instability > From: <kj...@kj7rt.com> > Date: Thu, May 22, 2014 7:31 am > To: Elecraft@mailman.qth.net > > > I am trying to use my XG50 to run the Extended Temperature Compensation > Procedure on my KX3. This is the first time I have attempted to use the > XG50 since building it. I have completed the 8 hour burn-in. > > When I first connect the XG-50 to my HP frequency counter, I get a > reading of something like 49.379990. Then after running for several > minutes it starts dropping in frequency to something more like > 49.32xxxx. It is still wildly fluctuating. If I connect the 10MHz output > of my Trimble Thunderbolt GPSDO to the counter it stays quite stable > just below 10 MHz. > > I re-soldered all the XG50 components and tried with both a metered > home-brew power supply and a 12v SLA battery with the same result > although re-soldering made a significant but not permanent improvement. > > My lab is in my photographic darkroom which has an ambient temperature > of about 68 degrees F and the AC does blow across the work area. > > > Thanks, > > Gary Marklund > KJ7RT > Sun City, AZ > USA > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to kj...@kj7rt.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
